Rock-pulverizer.



No. 697,505. I

H. LUCKENBACH. ROCK PULVERIIEB.

(Application filed Dec. 19, 1900.)

Patented Apr; l5, I902. i

(No Model.)

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A TTOHNEY p and there ground to an impalpable dust by.

UNITED STATES PAT NT- OFFICE.

HARRY LUCKENBACH, OF SEATTLE, WASHINGTON, ASSIGNOR OF ONE-HALF TO JAMESA. ELWELL, OF SEATTLE, \VASHINGTON.

ROCK-PULVERIZER.

SPECIFICATION forming part Of Letters Patent N0. 697,505, dated April15, 1902.

Application filed December 19, 1900. Serial No. N0 m To ctZZ whom, itmay concern:

Be it known that I, HARRY LUGKENBACH', a citizen of theUnitedStates,residin g at Seattle, in the county ofKing and State ofWashington, haveinvented certain new and useful Improvements inRock-Pulverizers, of which the following is a specification, referencebeing had therein to the accompanying drawings.

My invention relates to rock-pulverizers, and particularly to that classWhere the granulated rock is propelled to a focal point by opposing jetsof steam, air, or both combined the attrition of the particles amongthemselves at the said focal point and the pulverized material separatedby gravity and an upcast of air or'steam.

The objects of this invention are, first, to construct a machine of thischaracter where each part of the pulverizer will perform its function tothe best advantage that is accomplished by the novel construction of theseveral ducts and passage-ways, so that the vacuum required to operatethe machine may be attained and at the same time give accessibility tothe interiors needing attention, and, second, to provide an exhausterthat will separate all of the lighter from the heavier particles. Iattain these objects by means of the novel construction of certain partsof the machine, the use of gates, and the improved exhauster, all ofwhich I will proceed to describe, and point out in the claims.

In the accompanying drawings, where like numerals of reference denotecorresponding parts in all of the views, Figure 1 is a verticallongitudinal section of a pulverizer embodying my invention. Fig. 2 is avertical transverse section of the same, and Fig. 3 is a perspectiveView of one of the side ductpipes 4 in Figs. 1 and 2.

1 is the stand, supporting the body of the pulverizer 2, which is formedwith a central chamber 3 and Wing-compartments 4, which are conducted bythe side ducts 5 to a hopper 6. said parts, as well as between thechamber 3 and the exhauster lead-pipe 7, are close-fitting joints toexclude all air at such points, and thereby permit the forming of avacuum, which is essential to operate the machine. I

The connections between the aforeprovide, however, upon the side ducts 5airholes 8, with covers 9, that for certain classes of work, notablycement-rock, are perforated with small holes 10. The holes 8 arehandholes for removing lumps of the charge too large to pass through thejet-nozzles and also for the passage of air admitted by perforations 10of the hand-hole cover 9. These per= forations are positioned in theupper inclined 6o part of the said cover in order that none of thematerial being treated will sift therethrough when the machine isstopped. Unless air is admitted in close proximity to the notzle avacuum will form to prevent the even distribution of the material andsmooth running.

11 is a pipe leading from a steam-boiler or air-compresser and connectedwith the Wingcompartments 4 by two or more goosenecks 7o 12 and endnozzles 13, so disposed as to con centrate the emitted steam or air to afocal point within the chamberfi.

14 and 15 are respectively bushings and wearing-tubes to direct thecurrents passing between the wing-compartments 4 and the chamber 3. Theexhauster 16 upon the eX tremity of the lead-pipe 7 has a contractedthroat 19, intermediate of its length, with oppositely-flaringbell-mouthed ends, and the So lower one or that adjacent to thelead-pipeis preferably protected from abrasion by a hard-metal liner 17.

18 is a pipe connecting the source of air or steam supply to thejet-nozzle 18, projecting within the said exhauster to a point below thethroat 19. The axis of the exhauster and the pipe leading thereto are inthe same straight line to produce the suction required to impel thelighter materials upward through the ex- 0 hauster.

The operation of the machine is as follows: The rock to be pulverized isdelivered, crushed to a granulated state, through a chute 20, to thehopper 6,and from thence it passes, 5 through the side ducts 5, towing-compartments 4, where it is entrained by the steam .or air jetspassing therethrough and carried therewith into the chamber 3 to bepulverized by attrition of the opposing jets. The pulverized material isseparated, the lighter particles being drawn through the lead-pipe 7 anddischarged from the exhauster 16 by the upcast formed by the jettherein, and the heavier particles drop to the bottom of chamber 3 andthence through chute 21 to a conveyer or bins provided. If any pieces ofrock should have reached the wing-compartments 4 that are of greatspecific gravity or too large to pass through the orifice orwearing-piece 15, they fall into pockets beneath nozzle 13 and areremoved from said compartment by gates 22 at the bottoms thereof.

23 represents feed-regulating gates.

In some cases the pulverizer instead of being formed with twoentraining-jets may be made with three or more having a correspondingnumber of ducts and compartments and all arranged about a focal point,as described herein and shown in the drawings.

Having thus described myinvention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a device of the character described,

a central chamber, wing-compartments, oppositely-disposed nozzlesdischarging the contents of the wing-compartments into the centralchamber, each of said wingcompartments having an opening above thenozzle and a pocket beneath the nozzle, and covers for the openingsprovided with perforations in their upper parts, substantially asdescribed.

2. In a device of the character described, a feed-compartment, a nozzleprojecting therethrough, said compartment having an opening above thenozzle and a pocket beneath the nozzle, and a cover for the openingprovided with an inclined perforated portion, substantially asdescribed.

In testimony whereof I afiix my signature in presence of two witnesses.

HARRY LUCKENBACH.

\Vitnesses:

G. A. C. ROCHESTER, JAMES G. GIVENS.

